Turtle Island not accessible

[Pachacacha]

I tried to go to Turtle Island. I talked to the grandpa in the inn, asked about Turtle Island but the sailor at the docks wont take me there. Is the quest broken?

[Sergio]

https://ratemyserver.net/quest_db.php?ty...&qid=70007 - the most common quest, I just checked that it works
Be careful, there are several grandpas there